Dyes for dyeing furs, hairs, and the like.



E s'rAtr s PATENT oFFIoE.

ARNOLD ERLENBACH AND KARL MARX, 0F DESSA'U, GERMANY, ASSIGNORS T0 ACTIENGESELLSCHAFT F'U'R ANILIN FABRIKATION, OF BERLIN, GERMANY.

DYES FOR DYEING FUR/S, HAIRS, AND THE LIKE.

No Drawing.

To aZZ whom it may concern:

Be it known that we, ARNOLD ERLENBACH and KARL MARX, the former asub'ect of thQ King of Bavaria and the latter 0 the Duke of Brunswick,both residingat Dessau, Ger many, the former Schillerstrasse 5 and thelatter Albrechtstrass 16, our wost-oflice ad dresses being, the formerschillerstrasse 5, Dessau, Germany, and the latter Albrechtstrasse 16,Dessau, Germany, have invented certain new and useful Improvementsin NewDyes for Dyein Furs, Hairs,.and the like, of which the following is aspecification.

In U. S. Letters Patent No. 992,947 there are claimed new dyes for furs,hairs and the like which comprise an aromatic paradiamin andmeta-diaminoanisol (OCH :NH,:NH,=1:2:4) or meta-diaminophenetol (OC,H:NH,:NH,=1:2:4).

Now according to our present invention, instead of an aromaticara'diamin, we make use of a N-monoalky .derivative or an unsymmetricaldialkyl derivative of an aromatic para-diamin in conjunction with anorganic meta-diaminof the general. formula:

cimnai in which formula R means an alkoxy oup.

The para-dian in compounds serving or the present invention possess thefollowing general formula alkyl N/ (U x c.H.---nn.

Specification of Letters Patent. Application filed November 6, 1912.Serial No. 729,874.

Patented July 28, 1914.

to furs which may be previously mordanted or not, tints of greatstability are obtained which are more bluish than those obtained withthe new preparation of U. S. Letters Patent 992,947 and which aredistinguished by a full shade overhaud in comparison with the dyeingsobtained according to the prior invention.

The result could not be foreseen from the prior state of art and moreespecially from the patent just cited because there are no rules knownas to the behavior of such mixtures; it was as well possiblethat forinstance a mixture of para-arninodimethylanilin and meta-diaminoanisolwould be by no means suitable for the urpose in question.

As to the employment of our new preparations they may be used asusually, in combination with a free inorganic base, and more especiallywith ammonium hydroxid and in the presence of a suitable oxidizingagent, such as hydrogen peroxid.

The following examples may serve to illustrate our invention, the partsbeing by weight: g

(1). A new dye according to our 'n-esent invention may be prepared asfollows: 6 parts of para-aminodimethylanilin are thoroughlyincorporated. with 3 parts of metadiaminoanisol care being taken that ahomogeneous mass is obtained. In dyeing a fur, and more especially a furmordanted with ferrous sulfate, with this new dye in fine and deeblue-black with a full sight overhaud is o tained.

(2). By mixing 6 parts of para-aminomonoethylanilin and 3 parts ofmeta-diaminoanisol a new dye is obtained which for instance by applyingit to a fur mordanted with ferrous sulfate in suitable proportionsproduces an intense bluish black of a great stability and of a fullsight overhand.

It is obvious to those skilled in the art that our present invention isnot limited to the foregoing examples or to the details given therein.Thus for instance instead of para aminodimethylanilin paraaminodiethylanilin or instead of para-aminoethylanilinpara-aminomethylanilin may be employed as well as a derivative of theseamins containing a substituent attached to the henzene nucleus.Furthermore instead of meta diaminoanisol meta diaminophenetol may beused.

It is obvious that in preparing the new dyes according to our presentinvention from such other diamins the proportions of the ingredients maybe varied in order to obtain the best results, the special mixtures fora new dye depending of course to a great extent upon the desired shadeas well as upon the special nature of the furs, hairs, etc., to be dyed.v

The new dyes may be offered to the trade in the solid state as indicatedin the above examples or in solution.

' Having now described our invention and the manner in which it may beperformed what we claim is, p

1. As new articles of manufacture new dyes for furs, hairs and the likecomprising an aromatic para-diamin of the general formula:

in which formula R and X each mean a univalent substituent, and anaromatic metadiamin of the general formula:

RI Cullg "'"NH-z (2) am 4 in which formula R means an alkoxy group.

2. As new articles of manufacture new dyes for furs, hairs and the likecomprlsing an aromatic para-diainin of the general formula:

in which formula R means a univalent in organic substituent, and X meansa univalent organic substituent, and an aromati v meta diamin of thegeneral formula:

3. As new articles of manufacture new dyes for furs, hairs and the likecomprising an aromatic para-diamin of the general formula:

in which formula R means a hydrogen atom and X means an alkyl group, andan arcmatic meta-diamin of the general formula:

in which formula R means an alkoxy group.

4. As new articles of manufacture new dyes for furs, hairs and the likecomprising an aromatic para-diamin of the general. formula lkyl /& N 1

03H); N Q

in which formula R means a hydrogen atom and X means a methyl group, andan aromatic meta-diamin of the general formula:

R! (l) Cafig "NHQ (2) NH; (4) in which formula R means an alkoxy group.

5. As a new article of manufacture a new dye for furs, hairs and thelike, comprising a para aminodimethylanilin and an aromatic meta-diaminof the general formula:

Calla H Nm

